We run the latest components on everything, WSRV 2012 / IIS8 PHP 5.4
Normal purchases go through without problem but with the coupon code it just not only gets not activated, for some reason I can not even set them activated manually afterwards.
Also the discount is not passed on to ASUBS and therefor showing an amount that was never paid.
article setting:
Result in ASUBS:
All of these ordered the same item, the red ones with coupon code of 100% (= free)
It is not very urgent I have an overload of work at the moment so if there are more details needed I might need a little bit more time....
Bastiaan